Specifications include, but are not limited to: 1. CENTRIFUGAL CHILLERS a. Monthly Service i. Check operation of chillers and report any signs of oil, water or refrigerant leaks. ii. Inspect control and Variable Frequency Drives (VFD)/starter panels, vacuum and wipe down as necessary. Also inspect for excessive moisture. iii. Read and record refrigeration pressures, oil pressures and temperatures. Record operating pressures and temperatures on service log to be maintained at chiller. Record position of chiller’s “on-off” switches (local, remote, esp., etc.). Rotate chiller and log. Leave chiller running after rotation. iv. Read and record entering and leaving chilled, condenser water pressures and temperatures. v. Check calibrations of transducers and temperature sensors. vi. Read and record compressor motor voltages and amperages, record actual load of chiller (percentage). vii. Check and log compressor oil pressure and oil level. Charge in oil (Contractor shall supply oil) and adjust pressures as required per manufacturer’s recommendations. viii. Check refrigerant charge. Add refrigerant (University shall furnish refrigerant) as required per manufacturer’s recommendations. If refrigerant needs to be added, perform leak test of chiller using a leak detector. ix. Check the starter panel/VFD cooling fan operation. x. Check VFD refrigerant cooling lines for condensation. Make adjustments to stop condensation of VFD inlet and outlet refrigerant cooling lines. xi. Check operation of chill water and condenser water automatic control valves for proper positioning and sequencing. xii. Clean and flush all pressure gauges and differential switches hoses, tubing or pipes. xiii. Check chiller for any unusual noise and vibrations. xiv. Log chillers using Carrier 19XR hermetic centrifugal refrigeration machine log sheet or University approved log. Review operating logs for abnormal conditions, including operating hours, cycles, alarms, etc. Report any discrepancies. xv. Keep chiller clean/dust free. Wipe down chillers as necessary. xvi. Review alarm history monthly with an authorized University representative. xvii. Check operation of all gauges, thermometers and indicating lamps, including chiller plant control panel and Motor Control Center (MCC) panel. Record all abnormal conditions and date of service in the University furnished composition book and report to the Campus Operations Office.
